Distribution Factors For Curved I‐Girder Bridges
Publication: Journal of Structural Engineering
Volume 112, Issue 10
Abstract
A study using finite element analysis was made to determine rational factors for the lateral distribution of live loads on typical composite curved I‐girder bridges. Within practical ranges, variations in girder stiffness and crossframe spacing had relatively small effects on the factors. The central angle per span and the girder spacing had the largest effects identified. Graphs showing the factors as a function of central angle for two representative girder spacings were developed for use with four‐girder bridges. It was also shown that reasonable factors can be obtained from a V‐load modification of the factors for straight bridges given by AASHTO. Such factors tend to agree with the finite element results for the exterior girders, but are conservative for the interior girders. Comparisons are also made with the factors given in AASHTO's Curved Girder Guide Specification.
Get full access to this article
View all available purchase options and get full access to this article.
References
1.
Carskaddan, P. S. (1984). “Evaluation of load distribution in multi‐girder straight and curved steel bridge structures with the MSC/NASTRAN Program.” AISC National Engineering Conference, AISC, Chicago, Ill.
2.
Carskaddan, P. S., and Grubb, M. A. (1983). “Live‐load lateral distribution for the approach spans for the Cooper and Wando Rivers bridge.” U.S. Steel, Research Bulletin, Monroeville, Pa.
3.
“Composite steel plate girder bridge superstructures—load factor design,” (1978). ADUSS 88‐7121, U.S. Steel, Pittsburgh, Pa.
4.
Grubb, M. A. (1984). “Horizontally curved I‐girder bridge analysis: V‐load method.” Transportation Research Board Record, 982, 26–35.
5.
Guide Specifications for Horizontally Curved Highway Bridges. (1980). and Interim Specification. (1981). American Association of State Highway and Transportation Officials, Washington, D.C.
6.
Heins, C. D., and Siminou, J. (1970). “Preliminary design of curved girder bridges.” AISC Engineering Journal, 7(2), 50–61.
7.
Heins, C. P., and Jin, J. O. (1984). “Live load distribution on braced curved I‐girders.” J. of Struct. Engrg., ASCE, 110(ST3), 523–530.
8.
McCormick, C. W., Ed. (1983). MSC/NASTRAN user's manual. MacNeal‐Schwendler Corporation, Los Angeles, Calif.
9.
Newmark, N. M. (1948). “Design of I‐Beam Bridges.” J. of Struct. Engrg., ASCE, 74(ST1), 305–331.
10.
Sanders, W. W., Jr. (1984). “Distribution of wheel loads on highway bridges.” Transportation Research Board, Synthesis 111.
11.
Schilling, C. G. (1982). “Lateral distribution factors for fatigue design.” J. of Struct. Engrg., ASCE, 108(ST9), 2015–2033.
12.
Standard specifications for highway bridges. (1983). and Interim Specifications. (1984–1985). American Association of State Highway and Transportation Officials, Washington, D.C.
Information & Authors
Information
Published In
Journal of Structural Engineering
Volume 112 • Issue 10 • October 1986
Pages: 2200 - 2215
Copyright
Copyright © 1986 ASCE.
History
Published online: Oct 1, 1986
Published in print: Oct 1986
Authors
Metrics & Citations
Metrics
Citations
Download citation
If you have the appropriate software installed, you can download article citation data to the citation manager of your choice. Simply select your manager software from the list below and click Download.